I use to use trophy rocks at my camera sites ( as well as every other type of block, lick, jam etc) at $25.00 each and the deer loved them, but then I tried generic 50lb mineral blocks that only cost $6.00 each just to see how they worked at the local feed store and they worked just as good if not better (I got pics of over 100 different bucks last year) so now I just use the generic blocks every year. Pike